NiO nanosheet assembles for supercapacitor electrode materials

Abstract In this paper, large scale hierarchically assembled NiO nanosheets have been favorably fabricated through a facile hydrothermal route. The as-prepared NiO nanosheet assembles were characterized in detail by various analytical techniques. The results showed these nanosheets present the thickness of about 30 nm and the surface area is 116.9 m 2  g −1 . These NiO nanosheet assembles were used as the working electrode materials in electrochemical tests, which demonstrated a specific capacitance value of 81.67 F g −1 at the current density of 0.5 A g −1 and excellent long cycle-life stability with 78.5% of its discharge specific capacitance retention after 3000 cycles at the current density of 0.5 A g −1 , revealing the as-synthesized NiO nanosheet assembles might be a promising electrode material for supercapacitor applications.